Debt consideration amount.

No definition available.

Name:	MGTI_DebtConsiderationAmount
Namespace Prefix:	MGTI_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Dividend or interest rate associated with the financial instrument issued in exchange for the original debt being converted in a noncash or part noncash transaction. Noncash are transactions that affect recognized assets or liabilities but that do not result in cash receipts or cash payments. Part noncash refers to that portion of the transaction not resulting in cash receipts or cash payments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4332-108586

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Describe the conversion features of preferred stock if preferred stock is convertible. That is, shares of preferred stock into which another convertible security was converted, or shares of preferred stock into which another class of preferred stock was converted.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
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-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

+ References

+ Details

Name:	us-gaap_PreferredStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

+ References

+ Details

Name:	us-gaap_PreferredStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=MGTI_SecurityPurchaseAgreementMmeberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=MGTI_ConvertiblePromissoryNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Balance Type:
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Namespace Prefix:
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- Details

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Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=MGTI_FiveTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=MGTI_SixTrancheMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
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Subsequent Events (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	Apr. 02, 2021	Mar. 05, 2021	Feb. 18, 2021	Jan. 28, 2021	Dec. 31, 2020	Dec. 31, 2019
Series C Convertible Preferred Stock [Member]
Preferred stock, shares issued					115	115
Preferred stock, shares outstanding					115	115
Subsequent Event [Member]
Gail loss from SBA of PPP loan forgiveness	$ 108
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member]
Debt instrument, face value		$ 13,210
Debt conversion price, percentage		70.00%
Debt instrument conversion price		$ 0.04
Debt instrument, interest rate		8.00%
Debt instrument maturity period		12 months
Debt consideration amount		$ 1,000
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| Initial Tranche [Member]
Debt instrument, face value		1,210
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| One Tranche [Member]
Debt instrument, face value		1,200
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| Two Tranche [Member]
Debt instrument, face value		1,200
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| Three Tranche [Member]
Debt instrument, face value		1,200
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| Four Tranche [Member]
Debt instrument, face value		1,200
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| FiveTranche [Member]
Debt instrument, face value		1,200
Subsequent Event [Member] \| Security Purchase Agreement [Member] \| Convertible Promissory Note [Member] \| Six Tranche [Member]
Debt instrument, face value		$ 6,000
Subsequent Event [Member] \| Series C Convertible Preferred Stock [Member]
Conversion of preferred stock			a Utah limited liability company, in connection with the conversion of 10 and 105 shares of the Company's Series C Convertible Preferred Stock (the "Series C Preferred").	a Utah limited liability company, in connection with the conversion of 10 and 105 shares of the Company's Series C Convertible Preferred Stock (the "Series C Preferred").
Preferred stock, shares issued
Preferred stock, shares outstanding
Subsequent Event [Member] \| Chicago Venture Partners L.P., a Utah limited partnership, and Uptown Capital LLC[Member]
Number of common shares issued			27,272,727	2,597,403